Dovetailing-machine.



1. l. -T'rm s P. A. SOLBLI.'

DOVBTAILIIG IAUBIIE.

l uruonlol nu oor. n, 1m. {fbrll 1, f PMM Jan. 18,11%'

HEBBES-112111131? k Fmg. 1

J. 'LL TEOIAB 8 P. A. SOLBWI.

nomma naman. LILLKUATIOU "MBD 00T il", 100D 118mm Ju. 18,1910.

W .m w

whuwe@ {N4/hmmm( WM J. R. THOMAS 1. A. OLEM.

,DOVE'I'AILING BOBINE. nrmonxol un our. 1a. non.

Ptnt'ml Jim1. 113.1129110.

'80 mdocknnd topmvi UNITED :STATES 1 .i'.xim-iir`4 timvimi;

'aim n. moins Aim Inn a. sonni. oi?v cmcnnmiri. omo. assioiioiss 1o J. L IA! e `Init conm. oir-cincinnati. omo. A concoiwrxoii or wm vnoniu.

` novlrAxuiio-rsacn'um. M8111. wetmttnet latten hte'nt- 'Uiuiiidll Jun. 118, 916

Y n Appunti sica uur is. isos. serial ma seem.

5011loin-itiniiiyconcern:l i 2A isnioiinted for slid' sidewerdhf. A

Be' it known th t we,- Joint IL'Tiioiuis` and Prnt Bullit, citilcnii of the United States, residing at Cincinnati, in the coi'unty I Hamilton and Stateo? Ohio lim/@jointly j invented certain new and une ul Iiuprovemulta in DovetailinglMnchiiies, of which the {ollowi in a itcation.

Our inven ion ie aten -to dovetailing uuit0 di v lly of that charac-tor of dovcte machine known as ng dovetnilin It is the object. ci our invention to 'providel 90' new. and ini means for iidpintiilily motmtin'g `tlie`,dovetnilcuttcr or cutters wlideby weer of the .ine mii'v be Died for; to vide n dovetsiliii iuac une with new an improved ineens w iercby the spindleii may be adjusted, to provide nc.-

end improved nieanu whereby the dovctaib tuttora may' be collectivel undl inde nd.

new au iiiiing and movin new mid iuipmvci ft' guiding sind supporting cnrvcd The further objects of our iiivin tion, and

tlie character. and cope of our invention 05 will lie 'readily understood from the following description .and claims and from the drawing, n which latter: p

l is av front elevation of our iniroved device. Fig. 2 is a side elevation of ently adjusted; to l provi means for'snp 40 ihn mme. llig. 8 is's plan view of thc usine.v Fight is ii vrrticnlpartly broken away. ci'owiiectionof the iisnie on the irrcguliin` line s--s of lfig. l. Fig. 6 is a detail partly in iiide elevation and partly in axial ection 4I' showing'the manner of mounting the dovetsiI-ciitter. Fig. 0 is s plan view of the saine. Fig. 'l is s crcm-i'edion of the same on. the line y-y of Fig. 5. Fig. 8 in a detail in horisontsl section on the liuc .r ot Fig. 'l

to illustrating the nianner ot mounting thc" up -besringnfor thc dovetiiil siindlon; nnsrli'i 0 in a di-tiiil in lioi'izoutu mation on the ine ir of Fig. l showing thelou'er bearings of sajd spindles.

It l iepi'eeentn the freine on, which n xaddle coni cn-l 'iihiift l5 and .acts sii a `of the table we provid cured to` the table, thus imit vulti rock-shaft for sn )porting said iiaddltv -nt its rear, thc eddie isvin s slidin iup- C5 t i/ort 8 between i grauw.

.ffm

ihn p in.,which a plum ity of dovetni front en end the 1I`hc lmiriuga 0 n on bearing-blocks t? 'ad- )notablyv secured to the traine by bolt 0' nissiiig through slots 6' inthe' beni-inglocks into the frmnie positioning bolts 0 W@ thi-raided in lugs tl' of the friimc bring rcceived 'againstl the bearing-blocks'.v .Cranknrius 9 nremcumctl to the rock-shaft, nei b 1 bolts 10, und are connected with the tab c by nicniis of linlis tl articulated to the crunli- 'i5 umm by bolts l2 and to the table by bolts 13. An upcnitin'g ann '14 is secured tothe rocio.` lever-for rocking thc forward-'and backward movement oftheftable for brin ing thc stuck lo sup rted by the table into ant ont of range of ie dovetsibciitten l5t For canin aidewiee nioveineiit of the table we provide `iin operntinlg 'lever 16 pivoted to the freine on s mud 7 the lever l e5 bein nl iown in the forni of si bell-crank lever uivinisti upward extennion 18 on whichii roller l in )ourniiled on a pin 20, theroller being 4rfi'ceivid between the walls 91 of s slot :t2 nt the rear ofthe naddle 2. The iisd 00 walls iirc provided with rearward extensions 28 which forni topa received against the rear wall 24 in the top ot the traine when t the tnble istiltcd.

The construction n tated permits the naddlc 05 f2: `toggthciwith the psrtii nupcrpoeed theieon, to hi ruined about the mclmhmt l. ss s pi'vot.' for ciipouing the mechanism between und middle und traine and for removing the saddle with the parte cu out of contiguity with the dovetaibcutteni.

For limiting the longitudinal movement 2o d i i. d1? hniii'da'iitheiioi" If 0 8 l ll I R0 n lugs Wand to be inilii li? duda 2B ac- 105 ngthe moveported by, the table mime end ciiiinii,

nient of the stock `up with relation to the dovetail-ciitters and controlling the length ofdovetails cnt therein. Our conieniction pen-mits exmptionnlly 0.

theieon J0@ I drawers or sido-piece and thc front or buck simultsiriev 13 Mami under control of the other hand operating tlie other operating lcvcr for retarding or aiding the operation, nsma be desired,v

In' cutting]` the stock, or instance for t e like, it ioydesirnble to cut the ously for the reslmtivccorners thereof. The fronts of the drawers uro sometimes straight and sometimes ure irovidcd with outward or inward curves, nown ns swell fronts, used 'for instance iirdressers, cliitionneim the like. We have rovided convenient means whereby st'raig t: iis well as s weil iiroiits muy be supported und ided irrespective ,of the curvature or irection of curvature of the seme.

81 in a comb secured to the saddle.' The side-piece of the stock is re recent/ed n.34,

y the end of-which rests upon t e comb against. a back et the front of the table, against.

'the bearings centric roller 60, jours which it is lateral! 4 itionedb cidef geo 86 ad'uatably inst i'he s. by bo te 87and nuts 87 the Aheads of the boltsl bein received in en undercut alot 88 in the bac The side iece is clam in place againctthe beck y e clump 8 coimpriaing a late 40 arranged to contact the laide-piece y means of en eccentric rollerv `41operated4ibiay a handle 42 and journaled rings in bea at one end ot screw-rods 44 slidable in beari 45 at. the. tive en'ds of the table, springs 46 of lig ter tension and greater extension being received :about said screw-roda 44 between the' bearings 45 and plate 40, and springs 47 of greater tension and leas extension being received between the bearings 45 and nuts 48 on said eeuw-rod the springe M eausinlg retraction of the plate 40 and the springs 4 permittingr 48 of the eentric roller to yield upon excessive pressure being brought to .bear against: the aide-piece.

A straight. front. is shown at 51, an out- `wim-dll curved swell front is indicated in dott lines' at 52a and an inwardly curved.

swell fronia'liii. in dotted lines t n are arranged to e me. by. im u; which ma con. one or more ain platee conci?l oi' the table en normally supported on pins 57 elidcble in slcts of s yoke 59 neimnt which en ec ed in bearings 61 on screw-roda 62,- ie mdated to bear and be by a handle "www . received about the. crewtiened by nuts 68 for aul farting theyoke 59.

baclr esv platre und have .nuts '(3 nt. their uper und.;

which abut nfuinst the yoke, the imidii'. ends of said pins boing received in recesses .74 in sn'id yoke.

The forward cmi of thclront or hack of the drawer rests upon the 'comb 3l which foriiisu resting ledge for the .Huid foriviiid end. A rcar sup )ort B0 rovided and is -nrraiied to he paced nt. mutable elevation p ,fe in horizontal plum with with its upper ci the. resting surfurc of thc comb for struight fronti; or above or below ssi'd horizontal plane for swell fronts, depending on 'the curvature of the latter. This' rear support preferhbly .comprises ii 'rounded bnr -8-t chown ns'n rcli uiviu con ection njitlisid'c arms 82 pirated on l lts located adjucent .to the comb, clauipbolts 84 being received throuzli nrc=slots85 in the'sidc up rights or' vthe 'table for clamping tue' sume in ndjnsted cushions. .Side-gages iti' .nre 'provided with nim 88 undv nre" received about. theroll Sl'whiie n rod 80 ofsubctun- `tinlly less diiuneter than the -roll is receivwll 00, in the side'"arins, 'the suid gages licin provided ivit'li .aperturesv 01 through tv iii-h thecrodpiussc's. 'The side' piges are su ported by the roll :and the 'rofl und extend orivnrdly to n point closely ndjncent the comb. vthere bcimg free' spscc between scid mmh mid-the roi und; ioil for permitting swell fronts to'be iieoeived' above or below thev horizontal plane oftlietbinb. The f'orwiird Aends'of the sidegrs tum* it'rce and .the modepf support of t ic satiir upon in bourin 'the roll and rod insure that the suid forward sol ends shall be stall times witlii|i.the horizontal 'plane of the supporting face of thc' comb,

the said `t'rec ends maintainin i position in line with ihe pivotal axes of t e'side arms 82 irrespective of the extent of ttdjubtnieiit of the sup rotting-mil.

'The com is provided with treatin arranged to be received between the dovetoii-cii'tters l5 when the table is moved forwardly forl nml:- in `thuydovctiiil cut. in order to round cui thefront ends of the tenons of the dovctnils iu `thsironts to'coriesmnd with the rounded rear wnlls' of the ovetnil-gimves in the sideswe provide means 'or moving; the'aaddle and teble for effecting-c rcircu ar movement ofthe for l ward ends .of the fronts with relation to' the cutters. )For guiding the parte inthis unovc- `munt, we provide av iinM secured to' the i opening! 05 freine und nmi'i t irougii ari in the sadd e. e pin may have e roller 97 thereon, the rbiier being received in ev Astraight slot J8 having a curved slot' me n thereiuto for forinn a tongue 100 betvvgiieiig said slots which is iided around lili the roller 97, the'slots'aiid thetongue being on the table, the walls of thewldt limiting thc movement of the tublc., Tu effecting lhis` movementjthelcvcr it is depressed .for forcaida incontro ling the lateral poaition ot the- '.mn Y l n ing the table and the straight 'niet' titl forwardly, dnrin which movement the lever saddle. lThe lever ll ia then raised for hacking the tablefthe'roulnled .end of the ton te heingA canned tmfolow ahout the. ro t'l hy the upward premure exerted on theV lever Ml. tl npwanLpreramre on the lever 14 lning c tanned to'a' downward pretence mi mon 'aatlanu ward prtymul'e on the lever'ltt ia |nit|ated.'tor canaln lateral movmwut'of the tahle. whereby tte rounded 'endof the tongue 100 ia caused to move about the roller it?. the premnre on the lever 14 being chan to a downward prenante florv cana! ing t ie rem' wall of the curved lot n0' to travel upon the miler. vDuring the unovctnent ntateththe roclonhaft m cmoml to.

mcltdur'ing the longitudinal movementof the tahle and to move axtallv dur-niglnteml movement of the middle. both movements lie-- ingelmtmllcdby the respective hands of the -opent r. The slots 98 00 muy he formed in aalot-.glot'lt 10| nccnrcd to the taille hy holt |02 pantingtltrouh dota 103... A cover-` a ience. m' driving the same. the resent ex.-

ein litlcatiou 'allowing the npind es in nests of' ve.

Each of the. doveta'iI-cntterx is nov'ided lwitlra ahanlt 111 having a threadev end 11:2`

and a suitable turning-neat 113 at the hase of tlt'e'entting wing 114 thereof. the said sent' hein ."ahown polygonal in crm-tne tion for 'receivin al wrench. 115 is a coller hmvin v -cxter'ua threada lltl and nn internal :moot n hone l1. the shank 111 of the dovctnibcutter heini; received in .the bore l11T. the tht-rada l1'12 lltl hein concentric with said ahanlt. The spindle la provided with a plu rality of eccentric boren of diterent diam-et'era in similar axial planea shown respectively at 118 110 for meivingreimectively the externally threaded collar and the threaded end of the shank 111. Theuttin'z edge 1m of the dovetaiI-eutter in thin au- "tioned "eccentric to the rotary axis" o the npi'ndln the amount ot this. eccentricity heing detennined bv the radinlpmition of thev cutting-edge withl relation to the n iindle. '.lhe cutting edge 120 of the dovetai cutter .la alao eccentric to the shank 111, being preterably at the highest point of m'centricity tho edge of the euttcrfwing in ground away or canning aaid cutting edge to recede about the wing of aaid cutter. f

Otlrnu roved conntruction rmitaa wide range of adjustment of the circle offswing of with relation thereto. As'the cutter wears.

the onttingf ed 120 lor iermitti adjuntment ot tie' nuneter o cut'ma e by the dtweta-il-cntter, and. when a lnrality of. dovetail-cnttem is ainulltaneous v employed. permitting ad ustment of said cutter ao that the name hal have a uniform diameter 'of awmpat theu` cuttnnz edges' and therehy rer- .mittmg uniform dovetailato he cut hy a 'of the cutter irm|mtive ot whether all of aaid cnttem are new or wlzether mancare new and other are worn. 1t is alsodenirnble that the dovetnil-cnttcm shall he positioned at uni` fon-m height. This is ata-uniplinhed b the nainstmeut of the collant' 11? which las a pony onal portion 1:82 im the receptiml of a #titane wrench. The construction is auch that the collar may he mined or lowered for |mntionin|z the annie to eneh'ln'igzht. eo that when the cnt'tera nre seated upon theeollara they moy he nll.of uniform hei lit or be of vreln'tively such heightathat tney will uil hnvc circles of swing nt their cutting.: edges which nrc of enuul dinnneters in the suine horizontal whine. TheV cuttera may he thus ndjunted to ieight und dinnieter of cut and ntl the sometime locked in jmitimi in such munner that the force or cntlingg` blows exerted upon the cutter \vill tcnd to tighten the cutter rnther thun to loosen the Home.

llt will'be noted from Fig. l tlutt the cub ters hn ve their cutting ed extending altere mately tou'nrd the riglt and left. The threads. between the nut und shank and the lesp'eetive spindles alternate `corrmpoluliugly. The spindles are driven ulternately toward the'right a and left by. plnionsrlzttnthe pinion# of the mpective nesta of spindles meshing with each other. `One of.t le pinions of each neat of apindles is preferably an elongated pinion. an shown at 12.6'. for. per mittiug simultaneous adjustment of all the spindles in the manner to he presently described. 121' ia Q drive-ahah journaled in hearings 128 in the frame and driven in suitahle manner. llleveh ra 1:20 ale secured to the drive-ahat am mesh with beveliu ion 130 on upri ht ahaft 1815 ournalet in bearings' 132 in t te frame. and lave piniou-r |33 nt their upper end. The pinions .188 mesh with transmitting geant 134 ou studshafts'l mounted iubearin 130 in the frame. The trnnamittiuggeu A, 134i` respectively meuh with the chmgatwl piniona. 126'. The spindles are collectively onrnnled in nn npron ll slidahle vertical v in guidewnya 188 of the frame. The at jtmtuicnt of the same ia awompliehed hy a screw-rod held ngaiust end-wisc movement in a hracltet 140, xecurcd -to the ifrnme 'and received in 'a threaded lug l1 41- of the apmutor adjusting the apron v erticnlly. .The apron is necnrex in place hy holt l"y M'eiyed hnong'h dota 1713 in thenpron und! into the ralne for aecurnizthe apron in adnuteihpoqitons. The

construction permits t te main drive-miro to lia 'the e `iuaiiiiall be iiiotuited iii the frame. the adjustment of the arron ii'tlecting oily the apiudle-piiiiong,

oi'igated pinion 26' of each nest of'tlie latter foi'iniiigtlie receiviu eatthroughout the various adjiotnients of t ie apron.

e lower .en dii 'of the spindles are journa'led in bearings ll, ithowu as bores in ii` bearing-piece ll'aecured to the a iron, and rest. u fn step-blocks 153 adjustali vsecured in sai byaiet-serews 154. he hear,

bymeaas` of bolts 155 received through the raar of thelapioii and threaded intothc beari ieee.

np er ends of ythe spindles are jouirnaled in a ariiigii .165 "comprising the ceparat'ed half-blocks ltiti'lti'i'l located in a recesq 16,4 in the` apron. The forward ones of tho halfblockl are arranged to he clamped to a. erop 'rt .108 li y incanti oil bolts 160l receiv through ii otaA 170 and threaded `into are-forced. iortvairdly toward the forward lialfblocltii 166 b iiieanit of set-holte |471 planing through tireaded apertures 17; in the rear wall of the apron and abutting against the rear half-blocks .with suticient lforati for causing a snng'joiiriial-tit hein-een stood that the force oi the cuttingl act ion of E the dovetail-ciitters tenda to cause a raising of the s iiidles. lf it is desired to adjust any of t e spindles verticaliy 'the holte Miti y are loriaenedl and the spindle shifted vertit cally to i .roper poaition7 tlieieliv poiiitionnzg;z

the doveiail-ciitter longitudinally, and when adjusted, the bolt iii again tightened. The,

netricrew 1W* ofthe spindle to he adjusted in allo-loosened for permitting ahiitiug ol' ita mop-block 153 the utep-block being pushed intoy engagement with the lower end of t e spindle inthe adjui-iled position ofltlie naine and the riet-ricrea' |54 tightened.

iidjilittment of the res iective dovetail-cuttera may be obtained boti `i'or diameter oi the i circle of .cut and longitudinal positioning ot the dovctiiil-cuttor. indeiwudent longitudinal positioiriii of the respective spindles may alito be o itaincd, and the Npiud'i'es and dovetail-cuttei'a iiia' v he collectively adjusted to ioiiitlon, -wliaichy 'proper deptlnt vand circeaof cutis und positions of ents of all the dove'tail-cuttera mayA beolitained irreapective'of-tlio wear to which any oi' `the the coiintri'ic.tioii-stated independent ng-pieoe'is secared'to the apron preferably vsecure hy Lettera l'atent is:

i i i i camail dovetuil cutters may have been subjected, for ohtuining i iii the product.

' Having t'husfnlly describedour invention. 'what we claim as new and desire to l. ln a dovctaling iiiacliine, the coin-binatioii of a table, a saddle and a niiiin frame nuperposed one upon the other, said saddle.'

and table constituting; movable arts, a lonitndiiially movable 'rock-sha on said rame having operative connection -with' said movable parts, and a pair of operating levers for longitudinali and rockabl movf -ing'aaid shaft. substantially. as deecri .l 2. llii a dovetiiiling machine, the combination of a table, a saddie. and a 'main frame superposed one iipon the other, said saddle and tahle constituting movable parte, a ahal't on said frame about the axis of which the said movable parta are arranged to -.-wiii; r. nii operating lever having connection with :nid ahaft for moving said mer/able parts 'in a given direction, and a'second operating lever having connection with the other of `said niovahle parts for moving the uniform dovetaihi throughout saine at -iihstaiitial right angles to said given di'ieetion, for the purpose specified.

2l. in n dovetuilin f tion o a frame. a tiovetailin -spindle jouviialed thereon, a middle, a taliio; said saddle and table coiistitutiii movable parte, n shaft about the axis o which lsaid inovabie iui'ts are arranged to swing toward and rom said spindle. an operating lever having i operative `connection wit-li said `shaft fot?, moving one ot" seid uio-vable parte in a given duw-tion. a second operating lever li vini'v operative connection with the other 0 sai niovahle partei i'or moving the same in n direction at substantial right angles to said given direction. and said inovalile parts and 'ii'anie having a stop between them for liniiting the swinging movement of said' movnlile iuris. for the purpose specified,

i. n a dovetuiliiig machine, the combi; nation ofu frana, adovetail-iipiiidle 'ouriialed at the front thereof, n rock-iihti t'in Huid `iranie` a saddle. hearings therefor about luid rock-shaft. n tiililc iiioiiiited on saitl middle. an id rock-shaft haviiigg'operative couiiectioii with .said talile forinoving the naine on aaid iiddietoward and from said'epindle, andan-operai ing-lever having operative connection willi isaid saddle for iiiovingtlie same and said rock-shaftlongitudinally, for the purpose speciiied. i

fi. n a lfang dovetailing machine, the ei'iinliinatimi of a fraaie, ii gang of dovetaii'- spindles jiuii'iialed nt tlie front. thereof a longitndiiiully niovahle'rock-shaft 'oiii'naied ut,y the reni' thereof. n saddle jotlrna ed about and movable longitudinally with said rockv vahaft andeli'dahle laterally on said frame a tahiti niidalile liiiirlcandl thirtli on mid Middle,

machine, the ccinbinal il' Hoidiock'mliaft having operative commotion t viith lid table an opera. tin arm @or said :niek-shaft for'inoviirg aaidigahle 'bock andA and an operating lever having open' spindles nl thel front iercof, a longitudinelly movable rock-shaft journaled at the mr'of ssid frame, ooniiecti arms secure'd to nid rock-shaft, n saddle, rings therefor l tudinall positioned about said :M'mil l tion with said saddle lml between seid connecting arma and talil an operating erin `I acniiod toaaid melo-aha t forv rocking the innie and an' operati lever moving said mok-aliaft axial y, for t ye pui-pose specified. 7. in a gang dovetailin machine, the combination of a table, ua; sa Ille and n frium` anparl one upon c ot ier, a n o Alimon.. indi.. .i uw from anni g a longltu inalllv movable shaft joiu'naled at the rear of aai frame and having operative connection' with said saddle and table, said l l table and saddle having swinging movement about the axis of said rock-streit toward end 30 from said dovetail-spindles, and o peir of operating levers having oierative connection'ivit seid rock-shalt or rockin end moving the aline longitudinally, there ing iding faces between said table and frame limiting said movements, for the` pur- MI a gang dovetailing machine, the

combinaticn'of a frame,'a gang of dovetsild. spindles journaled `at. the front thereof -tudinally slidablo rock-shaft 'ournaled reciof said rainela sadd havin about said rockaft and alidab e e on said frame a teble sldable on lnddle toward and nid roch z-xhafthaving operative linmneeton 'itli'nid table for sliding the mine, a pair tin leverahaving operative com, lad viti said longitudinally olidable aorlift` for controlling the longitudinal and rockable movements of the same, and luid frame and tiible havin ndustable guid ing parta therebetween or imitin -uuid movements, for the purpose aperitivi 0. In a gang dovetailiiig niurhine, the combination vof'a frame, a

no gung of dovetnil- `spindles -jourmiled at the iliont thereof n.

longitudinally mov ble niek haft journnled in said franie,'s sud( le hevii bein-mg about the axis of said rock-slisftqor su iporting said saddle at'the resrthereof iin )ermitting aviin 'ng movement of said sa( dle to.

uard ani from said spindles, the front .of

said saddle bein an ported on said frame,

a table slidable cli and forthon laid aadaaid rock-shaft having operative eencombination of a frame a gang oijoveteili a tab e having slidable connota# frame,

tion to seid nniin frame, a

.blocks in suid respective bores secured prisii 'regulating the journal froni seid spindles,

v spindles uection with said table n pair oi operating; levers for rontmlling tlie mckable ond lon- `ritndiniil movements oif'said rock-,shaft and tlierehy umtrolling the positions of said table with relation to unid spindles, and an odlafable cuni-piste und iide-piece therefor `weon said friinie nmV table foi' limiting said movements of seid table, substantially its described.

l0. ln ii gung dovetu'iliiig iimeliiiie, the lia 'olmibinaton of a mai-n frsnie, an apron vertically ad'iistsble thereon, a 5mg of dovetail-spinti es jonrniilcd in sai apron, pinions on said .spindle inhiii with each other, on'eot" said tpinions' being :in elan. gated pinion, nu driving inccheniain mountei on snid frame comprising a gear meshing `with smid elo voted pinion throughout the adjustments o said apron for pen niitting muintenunee of driving connection et; between sin id gearing on said frannneand said spindle-piments by adjustment solely of oaid iipiiidle-pinious, substantially as described.

ll. ln o gang dovetsiling machine, the combination of a main frame, an apron, means for adjusting said Aapron with'rela. j ng of dovetail. s indles, dovetiiil-enttera t ieeon a .bearing b ook on suid apron hn'ving a plurality ok bores therein serving mi bearings for the 05 lower ends of said iespeetivc spindles, :ltspt ieieiii by laterul pim-ure themu and beni*- ings for the upper ends of mi t spindles conin pair of half-blocks for eaeli of aard spind es, one ot' which is meijnnotable lon tndinally on siiid apron, saciar-ing means or Y-oeenriuig-tlie sume in adjusted positions to suid n iron, iind i'lnmping moans acting ou tlieotieiof seid respective half-blocks for ressure et the upper ends of said spind es, and constructed and erro j 'for n'djunting-mid dovetniilcutters to might mletively to each other, substantially iis doirrilird.'

l2. ln a dovetailinpg machine, the combilnition of a iiiiiinram'e, sii apron adjustable thereon, a `gung; ofl dovetail-s indlea having; journals st their lower sn upper ends, dovetuil-cutteis theirfor, hearings for the i'os lower journals ot ssid spindles, step-bloclcu for sindV spindles udjustulile 'tht-rein, honi'- injgs for the n iper jourmila of said spindles, enrli ofivliioi `co iiipi"n-eu a psir of lialihlorks. menus' for udjuntiuhl'A nerurinf one 12;:2 of euch oi unid viiirii ot his f-bloclia ong I tudinally on siii apron, menne for. ad nating theedistanee between the respective ialtblocks of siiid pairs of lnilf locks, said ieovidrd with collars bearing against said'liiilf-blorlzs for llhnting theiipward movements off smid spindles, and coni struct and arranged forindapendentll? and oolleotivelyl ad'usti aai ail-cn ters to height, am.' ing gears on :iid .we

i rpindles ieir lower and up therefor, bearings or thelower journals of -iiall bolts received t g casein for driving thc saine, substantially its described. e 13. In n vdovetailing iuacliiiic, the combination of n iiiaiii frame, aii apron Vthercoii,'ii

iang of dovotail-spindles having journalsat t t iI ends, dovetiiil-cuttcrs said spindles, step-blocks for said spindles vadjustable therein, bearings for the upper journals ofsaid s indles,cach of which coin-` rises a pair of ialf-blocks, iiiea'ns foi'adustabl securing one of each of said pairs of hul -blocks loiigitudinall on said apron, istance between the respective halflocks if-said pairs of lialfblocks said spindles provided with collara bearing against said half-blocks for liniiting the upward movement of said s iiudies, andcoiistructiul and arranged formijusting said dovetailycuttera to height relatively to each other, `iiieshinggears on said spindles,` for driving the suine, one of said gears la `ing anelonguted gear, driving gearing on said frame meshing with said elongated gear, and nieans for adjusting said apron` for collectivelyadjusting said indles longitudinally -under maintenance o driving connection between the geariiig'on. said frame and said spindle-gears through said elon ted gear b adjustment solely of saidspin iti-gears, su istantiall as 'descrilmh 14. In va dovetuiling mac ine, the coinhina tion of ainain frame, an apron thereon. a

ng of dovetail-spindles provided with rcolors, a bearing for the up er end of each of said spindles comprising ront-and rear halfblncks, a vertice which said half-blocks are received said re cess havina front wall provided with a .slot for each o said front. half-blocks bolts re oeived through laid slots into said firoiit halfblocls for poaitininhg the same longitudi rough the near wall of aai recess for adjusting the journaltitsof lib said half-blocks about said spindles, and lower bearings for said spindles coaiprsin adjustable step-blocks for supporting sait sp ndlss with the collars thereof a inst said halfbloc substantially as dcsci'i l 15. In a ovetailingmachine, the combination of a rotating part provided with a phirality of eccentric bores of diticrcnt diameters in similar axial planes, suid bores heini: internaliy threaded, a dovstsilciitter provided with a tlia'ded shank received iii the smaller oiieof said bores, and an externally threaded collar received in the larger one of said b ores, said dovetailcutter provided with a sli'oulder for limiting the axial movement of said cutter by the axial-position of said collar, for the urpoae described.

10. I na' dovetaihng machine, the combination of s rotatiii'sart, a dovetail-ctttter rovided mths th ed shank, a limiting-p ece tric' `horca n ineens for positioning said therefor provided with external thi-ends Nui hitter threads' und 'the thread. of .-aiid l-iutii hein concentric willi relation to euch otla and ocutcd ecceiitriciilly to the i-oiuiv ax' of said rotating part, sulmtaiiiull)- its th scribed.

l?. lu n gang dovetniliiig nuichiiie, tl| coiiihiiiatioii of n phirulitv of rotutingpuri euch having ii ilui'ulit v of eccentric threade hores of dit crciit ,diameters iii itiiiiila uxiul iluiies, dovet'ail-cutters provided wit threat ed @hunks littiiig said hores of .lei diameter and provided with shoulders, an positioning-pieces threaded i'nto said eccei greater diameter for litiiitin the inward movements of said shoulders, tl;

`smid dovctailcuttcrs heilig provided wit cutting ed'ves eccentric to the longitiidiiii axes of sait shankand said' i'otutiii p'art and constructed nud .urraugial for t ie pin f 1-8. ir'icti dovet'uliug machine'. the coiubini tion of ii dovctail-spindlc, a table, means fc moving )said table toward an'd fr'oin siii spindle and laterally' thereof. a coinb on 'sai tiible for supporting stock at itsfroiit end.;

i'ea'r-su port for the lstock comprising arti pivotet to said table adjacent to said comb, rouiided bar secured t o the swinging ends( said arnis, a rod supported adjacent to an .movable with said rounded bar, and a sidg gage for the stock adjustable laterally 'a uuid rounded ha r und rod and having an ui suplaiiaedeml located adjacent t'othe pi` otal axes of said swinging arinsthroughoi the Swingin 'niovementsof tbesa'nie. reces-i in said-apron iuv de),

l0. Ina vetii'iling machine, the conihini tion of a f rnnie.'a @retail-spindle, a stocl supporting table adjustable tovard and fro und-laterally of said spindle. agcoiii'b table' for supportiii the forward end i stock adjacent to siii spindle, arear iup r for said stock coiuprisii argus pivot t said tiih'le iid'ucent to sai comb. a round! bar and a r between the swingt! endat said nrius. side-gages havi rings c aait `rounded har and rod and iavin unsii ported forward ends adjacent to l d cotti gages latgirall, and means for' positioning' said swirfm arms with .relation-to saidtahlc, thi` roi ends tif-said side-gages honig unsnp torte und adjacent to the pivotal axon of aai l stili arms throughout the'swiugiiig movements i the latter, substantially as described:

Intestilnoiiy whereof, we have signed oi iismc's hereto in the presence of twoiiuhscri ing witnesses. f

JOHN R. THOMAS.- RETERA. SOJEM.

Witnesses. `,-Hiiairii'. tii. Rosal,

Y RioiiaaoD. Coax. 

